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H. B. MERCE- STONE AND ORE GRUSHBR.

Patented Feb. 14, 1882.

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PATENT HARRISON B. MEEOH, OF NEW YORK, N. Y.

STONE AND ORE CRUSHER.-

SPECIFICATION forming part of Letters Patent No. 253,742, datedlFebruary 14, 1882. vAtpplicatlon filed November 19, 1881. (No model.)

. To all whom it may concern Be it known that I, HARRISON B. MEEOH, ofNew York city, in the county of N e w York and State of New York, haveinvented certain new and useful Improvements in Stone and Ore Crushers;and I do hereby declare the follow -ing to be a full, clear, and exactdescription 4of the invention, such as will enable others skilled in theart to which it pertains to make and use it, reference being had to theaccompanying drawings, which form part of this The object of myinvention is to so shape und construct thejaws that when they arereciprocated back and forth by any suitable mechanism they will exertboth acrushin g anda grinding effect upon the ore or stone, and thusreduce it much more perfectly than can be done where a simple crusheralone is applied.

Figure 1 is a side elevation of myinvention complete, partly in section.Fig. 2 is a plan view of the frame which moves the lowerends of thejaws. Fig.3is an end view of theframe, showing the manner of boltin g ittogether. Fig. 4 is a detached view of the jaws by themselves. Arepresents the two iron frames,which are bolted together by .means ofsuitable bars or braces, so as to form a solid rigid framein which thetwo crushing-jaws are pivoted at their upper ends. Each one of thesejaws has secured to its inner surface by means of suitable bolts achilled, hardened, or steel plate, which has its surface provided withsuitable corrugations, so as to take a betterhold upon the ore or stonewhich is to be crushed. These jaws are made concave at one end andconvex at the other,

as shown, and are separated a sufficient distance at their upper ends toallow the stone or ore to be freely fed in between them, while theirlower ends are in` just close enough contact with each other-to grindand pulverize the ore very thoroughly before it passes out from betweenthem. The lower portions of these jaws, where they come in contact witheach other, are not provided with such large grooves, ridges, or otherprojections as the upper portion, for the reason that they are to movevback and forth upon each other, and eX- ert not only a pressure but agrinding effect upon the stone or ore which is being crushed betweenthem. The lowerends of these jaws are connected together by means of arectangular frame, D, which has secured in one end theswiveled,connecting-piece F. Bolted to this swiveled connecting-piece Fis the lower end of the L-shaped lever ll, which is connected atitsouter end by the connecting-rod G with a wheel or any other suitableoperating mechanism,-X. As this L-shaped lever H is made to rock uponits pivot M theframeDispushed back and forth, and the lower ends of thejaws are caused to move with it. As these jaws are pivoted at E neartheir upper ends, their lower ends are made to rub back and forth overeach other as they are reciprocated, and thus exert a grinding andarubbing effect upon the ore. As the ore drops from the lower ends of thetwo jaws it is caught upon a sieve, S, which may be made to constantlyreciprocate, so as to shake the liner portions of the ore or rock lthrough it, while the coarser portions will be carried down toward asuitable receiver which is connected with an elevator, R, so that theselarger portions will be carried up and dropped back in between the jaws,so as to be again passed in between them. By means ofthis constructiononly ore or rock which has been crushed to a certain tineness Will getoutside of the frame.

I am well aware that jaws vhave heretofore been pivoted at their upperends, and that the jaws have been made oneconcave and the other convex,and thisI disclaim. My invention consists in making each one of thejawsboth concave and convex upon its inner side,y so that their upper endswill break the ore, vwhile their lower ends will grind and pulverize it.

Iain aware that it is not new to reciprocate the jaws by means of a`yoke, and that it is not new to provide the jaws with concave and con-IOO Vex surfaces which are smooth from top to bottom.

Having thus described my invention, I claim- In an ore-Crusher, thecombination of the two ia-ws pivoted at their upper ends and having bothconcave and convex surfaces, the said snrfnoes being roughened at theirtops where the ore is broken and comparatively smooth et 1o their lowerends where the broken ore is ground, with the frame D, the pivotedoonnecting-link, and the cranked lever H, which is connected at itsouter end to an operating mechanism, substantially as shown.

In testimony whereof I afx my signature in presence of two witnesses. f

HARRISON B. MEECH. Witnesses:

L. D. FREDRIGKS, NATHAN HENDRIGKS.

